Difference between revisions of "Apricot"
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| common_names = Apricot | | common_names = Apricot | ||
| growth_habit = [[Tree]] | | growth_habit = [[Tree]] | ||
| − | | high = | + | | high = 8–12 m |
| − | | wide = | + | | wide = to 40 cm trunk diameter |
| lifespan = [[Perennial]] | | lifespan = [[Perennial]] | ||
| exposure = Sun | | exposure = Sun | ||
Revision as of 00:25, 16 March 2009
| Lifespan: | ⌛ | [[Lifespan::Perennial]] |
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| Exposure: | ☼ | Sun"Sun" is not in the list (sun, part-sun, shade, unknown) of allowed values for the "Exposure" property. |
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| Water: | ◍ | regular"regular" is not in the list (wet, moist, moderate, dry, less when dormant) of allowed values for the "Water" property. |
| Features: | ✓ | Fruit, blossoms"Blossoms" is not in the list (evergreen, deciduous, flowers, fragrance, edible, fruit, naturalizes, invasive, foliage, birds, ...) of allowed values for the "Features" property. |
| Sunset Zones: | 3-24 (see text) |
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Rosaceae > |
Prunus > |
The Apricot (Prunus armeniaca, "Armenian plum" in Latin, syn. Armeniaca vulgaris Lam."Tsiran" ծիրան in Armenian) is a species of Prunus, classified with the plum in the subgenus Prunus.
It is a small tree, 8–12 m tall, with a trunk up to 40 cm diameter and a dense, spreading canopy. The leaves are ovate, 5–9 cm long and 4–8 cm wide, with a rounded base, a pointed tip and a finely serrated margin. The flowers are 2–4.5 cm diameter, with five white to pinkish petals; they are produced singly or in pairs in early spring before the leaves. The fruit is a drupe similar to a small peach, 1.5–2.5 cm diameter (larger in some modern cultivars), from yellow to orange, often tinged red on the side most exposed to the sun; its surface is usually pubescent. The single seed is enclosed in a hard stony shell, often called a "stone", with a grainy, smooth texture except for three ridges running down one side.[1][2]
Cultivation
Although often thought of as a "subtropical" fruit, this is actually false - the Apricot is native to a continental climate region with cold winters, although can grow in Mediterranean climates very well. The tree is slightly more cold-hardy than the peach, tolerating winter temperatures as cold as −30 °C or lower if healthy. The limiting factor in apricot culture is spring frosts: They tend to flower very early, around the time of the vernal equinox even in northern locations like the Great Lakes region, meaning spring frost often kills the flowers. Furthermore, the trees are sensitive to temperature changes during the winter season. In China, winters can be very cold, but temperatures tend to be more stable than in Europe and especially North America, where large temperature swings can occur in winter. The trees do need some winter cold (even if minimal) to bear and grow properly and do well in Mediterranean climate locations since spring frosts are less severe but there is some cool winter weather to allow a proper dormancy. The dry climate of these areas is best for good fruit production. Hybridisation with the closely related Prunus sibirica (Siberian Apricot; hardy to −50°C but with less palatable fruit) offers options for breeding more cold-tolerant plants.[3]
Apricot cultivars are most often grafted on plum or peach rootstocks. A cutting of an existing apricot plant provides the fruit characteristics such as flavour, size, etc., but the rootstock provides the growth characteristics of the plant. Apricots and plums can hybridize with each other and produce fruit that are variously called pluots, plumcots, or apriums.
Apricots have a chilling requirement of 300 to 900 chilling units. They are hardy in USDA zones 5 through 8. Some of the more popular cultivars of apricots include Blenheim, Wenatchee Moorpark, Tilton, and Perfection. Most will grow in Sunset Zones 3-24, but thrive in 8, 9, and 14. Some hardy Manchurian varieties (Prunus armeniaca mandschirica) will grow in zones 2 and 35-41. Extremely hardy types like 'Manchu', 'Moongold' and 'Sungold' may succeed in Zone 43.
There is an old adage that an apricot tree will not grow far from the mother tree. The implication is that apricots are particular about the soil conditions in which they are grown. They prefer a well-drained soil with a pH of 6.0 to 7.0. If fertilizer is needed, as indicated by yellow-green leaves, then 1/4 pound of 10-10-10 fertilizer should be applied in the second year. Granular fertilizer should be scattered beneath the branches of the tree. An additional 1/4 pound should be applied for every year of age of the tree in early spring, before growth starts. Apricots are self-compatible and do not require pollinizer trees, with the exception of the 'Moongold' and 'Sungold' cultivars, which can pollinate each other.
Propagation
Grafting for true offspring. Seed.
Pests and diseases
Apricots are susceptible to numerous bacterial diseases including bacterial canker and blast, bacterial spot and crown gall. They are susceptible to an even longer list of fungal diseases including brown rot, Alternaria spot and fruit rot, and powdery mildew. Other problems for apricots are nematodes and viral diseases, including graft-transmissible problems.
References
- ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedfoc - ↑ Rushforth, K. (1999). Trees of Britain and Europe. Collins ISBN 0-00-220013-9.
- ↑ Prunus sibirica - L.
